Results 71 to 80 of about 15,345 (175)

Monolithic Silicon‐Photonics Sign‐Sign Dot‐Product Circuits Toward Artificial Intelligence and Multiple‐Input Multiple‐Output Accelerators

Nanophotonics, Volume 15, Issue 8, 24 April 2026.
This research leverages advanced monolithic silicon‐photonics integrated‐circuit manufacturing technology with strategic electrical‐to‐optical signal conversions, differential intensity‐modulation technique, and dual rail‐to‐rail photodetection architecture to realize an on‐chip photonic‐electronic sign‐sign dot‐product accelerator achieving 8.92‐Gb/s ...
Sumilak Chaudhury, Karl Johnson, Nikola Alic, Bill Lin, Yeshaiahu Fainman, Tzu‐Chien Hsueh   +5 more
wiley   +1 more source

Millisecond‐Switching Dual‐Band/Dual‐Polarization Ka‐Band Wavefront Control Enabled by a Complementary Liquid‐Crystal Metasurface

Advanced Materials Technologies, Volume 11, Issue 4, 19 February 2026.
An LCD‐compatible complementary liquid‐crystal metasurface delivers dual‐band, dual‐polarized Ka‐band wavefront control with millisecond switching via a 10‐µm LC gap. Interlaced patch/slot pairs enable independent phase tuning at 28 and 38 GHz, while strategic 45° slot rotation suppresses parasitic resonances. Measurements on a 160 × 160‐cell prototype
Daehyeon Kim, Donggeun An, Hyunjae Shin, Youngno Youn, Wonbin Hong   +4 more
wiley   +1 more source

Phase Smoothing for Mutual Coupling Mitigation in Multifunctional Metasurfaces Designed with Diffractive Neural Networks

Advanced Optical Materials, Volume 14, Issue 1, 9 January 2026.
A diffractive neural networkdesigned metasurface operating at 86 GHz generates multiple holographic patterns by controlling the phase of subwavelength unit cells. A phase‐smoothing regularization mitigates mutual coupling, enabling accurate multifunctional wavefront shaping.
Damián Rodríguez‐Trujillo, Alicia E. Torres‐García, Mikel Aldea, Jorge Teniente, Asier Marzo‐Pérez, Miguel Beruete   +5 more
wiley   +1 more source

Millimeter Wave Energy Absorption by Human Tissues: Evaluation of Tissue Penetration [PDF]

Iranian Journal of Electrical and Electronic Engineering
Presented in this paper is an evaluation of human tissue penetration by millimeter wave (mmW) energy, particularly at 30, 35, 40 and 45 GHz. Numerical simulations show that the penetration depths in the tissue are (0.1000, 0.0937, 0.08869 and 0.08882) mm
Godday Biowei, Sulaiman Adeniyi Adekola, Kamoli Akinwale Amusa   +2 more
doaj  

Phase‐Changing Vanadium Oxides for Electromagnetic Radiation Management

Small Science, Volume 6, Issue 1, January 2026.
Vanadium dioxide's reversible insulator‐to‐metal transition near room temperature enables ultrafast, broadband electromagnetic modulation from ultraviolet to radiofrequencies. With femtosecond switching speeds and cycling endurance exceeding 100 million cycles, VO2 metasurfaces achieve tuneable absorption, beam steering, and polarisation control. These
Mohammad Taha, Torben Daeneke, Sumeet Walia   +2 more
wiley   +1 more source

3D mmWave Channel Model Proposal

, 2014
There is growing interest in using millimeter wave (mmWave) frequencies for future access communications based on the enormous amount of available spectrum.
Thomas, Timothy, R. MacCartney Jr., George, George R. MacCartney, Theodore S. Rappaport, Rapaport, Theodore S., Huan Cong Nguyen, Nguyen, Huan Cong, Timothy A. Thomas   +7 more
core   +1 more source

Material Properties Extraction of Mango (Mangifera indica) Leaves at Ka-Band Using a Waveguide Measurement System

Communications in Science and Technology
This study investigates the material properties (permittivity, dissipation factor, and conductivity) of mango leaves (Mangifera indica) over the 26–40 GHz Ka-band frequency based on a waveguide measurement system with a vector network analyzer instrument
Hana Arisesa, Sevia Mahdaliza Idrus, Farabi Iqbal, M.F.L Abdullah, Yusuf Nur Wijayanto, Purwoko Adhi   +5 more
doaj   +1 more source

Millimeter-Wave Power Harvesting: A Review

IEEE Open Journal of Antennas and Propagation, 2020
The broad spectrum available at millimeter-wave (mmWave) bands has attracted significant interest for a breadth of applications, with 5G communications being the main commercial drive for mmWave networks.
Mahmoud Wagih, Alex S. Weddell, Steve Beeby   +2 more
doaj   +1 more source

Robust Spectral and Energy Efficiency Tradeoff for RIS‐Aided Multi‐User Communication

IET Communications, Volume 20, Issue 1, January/December 2026.
In this work, an RIS‐aided multi‐user network with imperfect CSI is investigated. Correspondingly, we focus on balancing SE and EE through the collaborative design of the base station (BS)'s precoding matrix and the RIS's phase shifts, which consider the transmit power budget and the channel uncertainties constraints.
Xiandeng He, Yilin Wang, Shun Zhang
wiley   +1 more source

Design study of a thermocouple power sensor as a monolithic fin-line [PDF]

, 2011
Making traceable power measurements above 110 GHz using current measurement technologies is challenging. We investigate a design of power sensor consisting of a thermocouple-based integrated circuit (IC) mounted as a finline component in WR-6 waveguide ...
Jonathan Scott, Jones, Mark Hedley, Scott, Jonathan B., Mark H. Jones   +3 more
core   +1 more source